Nail extracting machine



Sept. 19, 1950 J. M. ANDERSON NAIL-EXTRACTING MACHINE iled Nov. 1, 1946 2 Sheets-Sheet 1 Inventar Atto meys Sept 19, 1950 J. M. ANDERSON 2,522,769

NAIL-EXTRACTING MACHINE Filed Nov. l, 1946 2 Sheets-Sheet 2 EEC! 'Jmhn MAndETEMSNT/ ttnrneys Patented Sept. 19, 1950 UNITED STATES PATENT OFFICE John M. Anderson, Washburn, Dak. Application November 1, 1946,` Serial No. 707,306

.Thisinvention relates to a machine for extractingnails from and for cleaning the surfaces of old lumber, for reconditioning the lumber for reuse.

It is a primary object of the present invention to provide a machine capable of much more rapidly and more eiiiciently removing nails from and cleaning the surfaces of lumber than it is possible :to accomplish the same operation by hand, and by means of which lumber can be reconditioned readily for reuse.

More particularly, it is an object of the invention to provide a machine. through which used lumber is adapted to be'fed and having novel means for initially extracting nails from the lumber and means for subsequently scraping and thereafter brushing most surfaces of the lumber for removing therefrom cement -or other foreign matter, which may be adhered thereto.

Still a further object of the inventionis to provide a machine lhaving* novel means for partially ejecting nails from one side of a piece of lumber and means cooperating therewith for completely extracting the nails from the opposite sidethereof. I

`Various other objects and advantages of the invention will hereinafter become more fully ap-` parent from the following description of the drawings, illustrating a preferred embodiment thereof, and wherein: I I Figurel is a side elevational view of a preferred embodiment of the nail extracting and lumber.

Figure 3 is a fragmentary perspective view of a portion of one of the nail extracting bars;

Figure 4 is a fragmentary top plan viewlof thev machine; l l I Figure 5 is an enlarged transverse vertical sectionalview, taken substantially along aplane asy indicated by the line 5.-.5 of Figure l, and I Figure 6 is a verticalsectional view taken substantally along a` planeas `indicated by the line Referring more specifically to the drawings,` the numeral I designates generally a preferred-H embodiment of the nail extracting and lumber cleaning machinaand the numeral 8 designates generally a truck, on` the rear of which the ma` chine `'l is mounted, and by means of which such machine is rendered mobile. 'I'he rear portion of the chassis 9 of the truck 8 is provided along onevv 8 Claims. (Cl. 254-f18) is laterally spaced from theinner edge of the platform `I 0.

The machine 1 includesa pair of transversely aligned upright posts I5, one of which is secured to the inner edge of the platform I Il, and the other of which issecured to the rail I4. As best seen in Figure 5, the posts I5 are provided with vertically disposed, inwardly opening channels, each adapted to slidably receive a journal box I6 which is disposed for vertical sliding movement thereinand in which a feed screw I1 is swivelly mounted. The `feed screws Il extend upwardly through `threaded openings I8 in the upper ends of the `standards I5 and are provided on their `upperends with Acranks I9. second pair of'journal boxes or bearings 20` are preferably disposed iixedly in the `standards I5, adjacent the lower endsA thereof. The journal boxes IB providebearings for portions of a shaft 2l, which extends `through and is keyedto a drum 22 for rotatably mounting said drum be-` tween the upper portions of the standards I5. One end of the shaft 2| has a sprocket wheel 23 keyed thereto and which is-connected to the sprocket wheel I3 by-an endless chain 24 which isitrained over the two sprocket wheels. A shaft 25 extends through and is keyed to a drum 26 and has portions journaled in the journals 2l) for rotatably supporting the drum 26 between the lower portions of the standards I5 and beneath the drum 22. A beltZl is trained over a pulley 28, keyed to` the shaft H2l and a smaller pulley 29 keyedlto the shaft 25; said belt being crossed between the pulleys, so that the drums I 22 and 26 will be revolved in oppostie directions;` for a purpose' whichwillhereinafter become ap- I.

parent. p.

Forwardly of -the standards I5, two pairs of smaller standards 3l and 32'are mounted in a like manner to the standards l5 and with the standards 32 disposed forwardly of the standards 3l and with thetwo standards 32 disposed in transverse alignment. v A shaft 33 is journaled by .vertically slidable journal `l:aoxes,;not shown, dis` posed in the standards 3| and said journal boxes are adjustably supported by feed screws 34 equipped with cranks and which function in the same manner and for the same purpose as the feed screws The shaft 33 is provided with a plurality of blades 35, which extend longitudinally thereof and which are secured therein and project radially therefrom, as best illustrated in Figure 2. A` similar shaft 36, equipped with blades 3l is journaled'in the lcweraportionsof the standards 3|. A pair of drums 38 and 39 are rotatably mounted between the standards 32 and are keyed, to shafts 40 and 4l, respectively, which are journaled in bearings, not shown, mounted' inthe' standards 32. The upper pair of bearings whichv journal the shaft 40 are adjustably supportedby a feed screw and crank 42 forfraisingandlower ing the drum 38 in the same manner that the. drum 22 is mounted for vertical adjustment', and as previously described. The bearings of the shaft 4| are preferablyy xedlyy disposedfin the lower portions ofthe standards? 32;v The drum-1 22 isirotatably connected' tovtheV shaft 33 bya'belt'43', which is1trained over pulleys 4'4and` 45 whichl are keyedr to2. the shafts-2|' and`33`, respectively, and the shaft 4D isconnectedto thefshaft'33'by` a belt 46fwhich'- is trainedoverf pulleys: 4'|f and 48 onlthe shafts 33'and 4B, respectively, so that theVv shafts 33 and 4|] will be driven by the' shaftl 2!=" and 'in thev 'same1direction.

Two .feedf `rol-1ers 4'9'fand'f5are:disposed in ver'-A ticallyspaced relationship between the standards-v and 3|. The upper feed roller 4S issupporteoty byfarmsk5| which projectffrom the-'journalsof l the'- shaft 33m-nd* the lowerfeed roller4 5|)fy is sirn-y ilarly supported" by varms-52 whichr project from` the journals of 'theshaft 36SY The feed" roller 49 is= driven in thefsame direction as the` shaft 33:1 by* anendless belt 54which-is trained` overrpulleys; not shown, keyed'ftoisaid parts; A similar pair of l feed rollersfk 55 and"v 56" are-vdisposed" for-4 wardly of the standard'-32and` are similarly supportedby arrns''v'land` 58, respectively; which are' mounted on-thejournalsfof'the shaft's40` and 4|` andlthefupper feed'l rollerU 55 isf rotatably con',` nected' to-the shaft'4 Mii-'and'driven'in theesam'e direction as :said shaft, by abelt'l 59'.

A shafttis disposed forwardly'ofthe drum` 26and`is journaled-in bearingsV 6|"wl'iich depend from portions-ofthe chassis -fandihasa' drum 62" keyed thereto, and 'which is -provifc'ied'Withfbristles'l ifdisposed" for wipingl engagementv with the periphery.y ofthe-drum 26; for a. purposewhich` willhereinafter-'be describedi Abelt 64 is trainedf andSE), respectively; and saidbelt is'icrossed inf-- ter-mediateofffitsends;v sox-that the drum 62fwill befrevolvedin theoppositelfdirection to the drum 26.1 The lowerfeedf rollerI is iconnected'I by a"- beltli to the shaft 65',- andisai'd?beltiisfvli'kewisel crossedfor driving the feedfroller50in `a counters-w4 clockwise direction asseerrl in Figures 1' and Z;

become apparent. The drum 26 is provided with circumferentially spaced, longitudinally extending recesses '|2 in the periphery thereof, in each of which a bar |3 is xedly disposed. A toothed bar 14 is Xedly secured to each bar 13 along the rear edge thereof and said bars 14 and each provided with a forwardly extending edge portion, disposed in a part of one of the recesses 12 and which is provided with V-shaped notches 15 whichaare beveledon the inner sides: of the bars 14.

A supporting roller 16 is journaled in brackets 1T of the platform Il] and the rail |4 and is disposed'. to: the; right or rearwardly of the upper portion of the` cylinder 26, as seen in Figures 1 posed'overf the platform'or floorr'll andlongitu dinally of the; machine l' and-"said"Walls]fandfll are aredf at; theirr rear:` or. right-hand ends,v as.' seen in-Figure 4';- Thelwalls T9 arexedly positioned, and' the=wallsil8 are each connected t'oa rod which is disposedsubstantially: ushwith the oorf 11' and which is provided.` with a threaded' portion; not?f shown, whichextends` through: and` threadedly engages'` an. upright 8|.,i-

secured either-to-theplatform |01 or rail' |4. The

rods 8U'r attheir1 outer endssare.l provided with?V cranks 82' by means of which said rodsvmay' be.1 rotated for;v individually' movingf the guide@ walls- 18, either toward or` awa-y'l from .their-associated? The chain'. 27h is` driven'-4 in the direction. asindicated. by'l thef 2lrrows-v in Figurerv 1;.. by the sprocket |35 and 1 shaft' |2 of thek motori` for? revolving; the drum; 221in'2thef direction'` asf' indi if-cated by the arrows in Figures 1 and2.' Thei drum 22 by lthe belts, .previously described', drives the.. drum 261i in the*v opposite direction and; the? brush cylinders:` 62 in: theopposite directiomtm. thedrum 26', as: indicated by the.'arrowszins.:Eigure 1. Likewise, the shafts 33, 3.6; 10i-and. 4|i are.` l driven eitherjdirectly orfindirectl-yy from the drum 22, with theshafts 4Illbeingrevolvedinl the samer. direction as the drum 22, when the shafts 35`i'andj 4| beingrevolved inthe opposite direction. Tl'ie upperf-feed' rollersL 49. andiy 55 are'- driven-in thea same direction as the: drum` 22, andthe lowerxfy feed rollers 5B and 56 are driven in the opposite direction by' the; belt* connections, previously described.

Accordir'igly, aboard"f82f-can b'e fed intothe space between the drums 22 and 26, over tlieffo'orrV 11 f and the' idlerV roller T65, while: being' guided," by and disposedi'between a wall 16 and'alwa-llTS. I'nl '4 advancing between thefdrums-fZZ and: 2'6'andwithf the board po'sitionedsof-that-the#heads ofan'y nailsf extending-therethrough; areZ disposedori-the`= underside thereof, the pointed ends: ofl the nails 83iwi1l' be'v engaged ley/fthe;notches 1| andftl'ius 'Y preventedfromfv riding; over-"the periphery of thef drum z 22. The 'notches as they f engageA thek pointed', end of 'ai nail' and'movetoward-v the board"E 82'wil1A force thel nail-S'downwardly through the; board; sufficientlylsof'that the shank' of"the11ail, adjacent'its head; will beengaged in a Vf-shaped notch .-'IETJonone'of-the barsfM fsupporte'diby the5 more rapidly rotating drum 26. As the nails are thus extracted from the board 82, they will be carried in a counterclockwise direction with the drum 26 and past the brush cylinder 62, which is revolving more rapidly than the drum 26 and which will therefore brush the nails 83 out of the notches to cause the nails to drop from between the cylinders 26 and 62, as seen in Figure 2. As the board 82 continues its advance from right to left of Figures 1 and 2 or toward the forward end of the vehicle 8, it will be engaged by the forward pair of feed rollers 49 and 5U, which will feed the board at a predetermined speed to the rear scraping wheels 35 and 31 which will engage the upper and lower surfaces, re-` spectively of said board, for scraping any accumulated foreign matter therefrom, such as pieces of cement. Beyond the scraping wheels 35 and 31, the board 82 will be engaged between the brush drums 38 and 39, which will engage the top and bottom surfaces thereof, for effectively brushing any remaining loose foreign matter therefrom. The board 82 will pass outwardly from the machine 1 through the forward feed rollers 55 and 56 in a thoroughly cleaned condition, and with all nails extracted therefrom. It will be readily apparent that the feed rollers will also function as retarding rollers, to prevent the board from moving through the machine 1 at an excessive speed, so that all portions of both surfaces of the board will be subjected to the nail extracting, scraping and brushing operations.

It will be readily apparent that by manipulation of the cranks connected to the feed screws I1, 34 and 42, that the drum 22, wheel 35 and drum 38 may be raised sufficiently to properly accommodate boards 82 of different thicknesses and that the feed rollers 49 and 55 will be elevated with the shafts 33 and 48, respectively, on which they are supported. The board guide walls 18 and 19 are especially provided for relatively short boards and are disposed relatively close to the drum 22 and are preferably inclined slightly toward their upper edges, so that when properly adjusted, as previously described, the rear ends of short boards will be prevented from tipping upwardly, while the nails are being depressed from the forward end thereof. The chain 24 and the belts of the upper drums and feed rollers are provided with sufficient slack to permit the slight vertical adjustment required for accommodating boards of various thicknesses.

Various modifications and changes are contemplated and may obviously be resorted to,

without departing from the spirit and scope of f the invention as hereinafter defined by the appended claims.

I claim:

1. A machine of the character described comprising a pair of drums, disposed with the peripheries thereof in slightly spaced relationship and between which a board is adapted to be fed, means on one of said drums for engaging the pointed ends of nails extending through said board for partially ejecting the nails from the side of the board, remote to said rst mentioned drum, and means on the other drum for engaging the Shanks and heads of the nails for fully extracting the nails from the board.

2. A machine of the character described cornprising a pair of driven rotatable drums between which a board is adapted to be passed, means on one of said drums for forcing nails partially through the board and in a direction toward the other drum, and means on the other drum for engaging and extracting the nails from the board.

3. A machine as in claim 2, and a rotatable brush cylinder disposed adjacent the last mentioned nail extracting drum and in engagement with the periphery thereof, said brush cylinder being revolved in the opposite direction to the nail extracting drum for engaging and dislodging the nails carried thereby.

4. A machine as in claim 2, and adjustable guide means through which the board is movable and by which the board is guided in its initial movement into the machine.

5. A machine as in claim 2, and means for vertically adjusting the rst mentioned drum for adjusting the machine to boards of different thicknesses.

6. A machine as in claim 2, said drums being revolved in opposite directions.

'7. A machine as in claim 2, and a common power source for revolving the drums in opposite directions.

8. A machine as in claim 2, said first mentioned means comprising recesses formed in the periphery o-f the first mentioned drum for receiving the pointed ends of the nails and having inclined surfaces to be engaged by the nails.

JOHN M. ANDERSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,194,617 Goss Aug. 15, 1916 1,461,712 Ellis July 10, 1923 1,599,713 Perlman Sept.. 14, 1926 2,266,490 Endebrock Dec. 16, 1941 2,446,741 Chidakel Aug. 10, 1948 

